Improvement in paper-bag machines



PATENT FFICE.

J. P. PULTZ, CF PLANTSV'ILLE, CONNECTICUT.

IMPROVEMENT IN PAPER-BAG MACHINES.

Specification forming part of Letters Patent No. 94,51] dated September 7, 1869; antedated September l, 1869.

To all whom it may concern:

Be it known that I, J. P. PULTZ, of Plantsville, in the county of Hartford and State of Connecticut, have invented a new and improved Machine for Making Paper Bags 5 and I hereby declare that the following is a full, clear, and exact description thereof, which will enable those skilled in the art to make and use the same, reference being had to the accompanying drawings making a part of this specification, in which- Figure l is a perspective view of my invenf tion. Figs. 2, 3, 4, 5, and 6 are detached views of various parts. Fig. 7 is a plan or top view of abag before the bottom is formed.

Similar letters of reference indicate like parts.

My invention. consists in the combination and arrangement of a machine which shall take paper from a long strip or roll and automatically fold, paste, and cut such paper so as to produce a finished bag, as hereinafter more fully explained.

The paper is placed on a suitable reel, and one end of it is passed through the former A, which former A consists of a narrow curved opening cut through a thin board. An elevation of the back sideiof the same is shown in Fig. 6. The guides a a guide the edges of the paper, and can be adjusted to different widths of paper. The paper is then drawn along and passed through former B, which is an opening similar in its outlines to the opening in former A, but the wood inclosed by said outlines is entirely removed. An elevation of the back side of former B is shown in Fig. 5. b designates a paste-dish, the lower end of which dish is provided with a roller, c, (see Fig. 5,) the lower edge of which roller o rests on spring d. One side of the strip of paper is passed between roller o and spring d, in such position that roller c traverses the paper a little distance from its edge, while the roller o is revolved by drawing the paper under it, and deposits paste upon the same, while gate g can be adjusted to regulate the discharge of the paste. The opposite edge of the paper passes under the spring d, while both edges are bent toward each other by the adjustable guides e e. The inclined pla-ne or table C then llattens the under side of the paper as it passes on and around the float D, which float D is a block of wood with the corners suitably rounded, and is hung, by rod f, to former A. When the paper passes around the float D its edges lap a little, and the pasted edge and the opposite edge are pressed together by weight E, which weight E is held easily in place by pins passing through holes in eachend. i

Care should be taken to have the edges of the paper lap far enough, so that no part of pasted portion shall come in contact with the inside of the paper, which is now a flattened tube, which isf-o be cut and formed into bags. Guides h are to hold the paper and float D central on the machine, and are adjustable, to accommodate floats and tubes of different widths. The paper now passes between feedrollers F F, which, as they revolve, will press the tube sufficiently to draw it through the parts before described. The rollers F F are provided with annular grooves t' i, to allow the rods j j, which connect floats D and G, to pass freely between them. Groove It is to allow the pasted seam of the tube to pass between the rollers F F without pressing the paste and causing it to ooze out beyond the edges of the paper. H designates a crank attached to main shaft l, which shaft l is provided with a clutch, Z, which is thrown into gear by spiral spring m, and out of gear by a side cam, u. (See Figs. 2 and 3.) Fig. 2 is an elevation of shaft l, and section of shaft 2, and some of their connections, and Fig. 3 is a side elevation of the lower shear-blade and cams for raising the same.

Clutch l and cam u are connected bybent rod J. On one end of shaft l is a bevel-gear, o, (but very little of which is shown in Fig. 2,) which gear o meshes into a similar gear on shaft 2, and drives the same. Gear I is attaehed to clutch l and plays freely on shaft l when the clutch Z is out of gear. The gear I meshes into intermediate gear I1, which meshes into gear I2, which is attached to one of the feed-rollers F F, said rollers being geared to each other to insure their equal rotation. The gearing ou this machine being of ordinary construction the teeth have not been represented in the drawing. As the feed-rollers F F rotate they feed the flattened tube through the formers before described, and between the shear-blades K1 K2, the upper one, K1, of which is stationary, and thelower one, K2, slides in ways at each end. When the paper projects from between the shear-blades the desired length for a bag, the cam 'n strikes the bent rod J and throws the clutch I out of gear, when the feed-rollers F F will stop, while the shaft l continues its rotation. If the feedrollers F F are not inclined to stop readily when the power is thus taken off, a strap, with' one end secured and the other end weighted, can be passed over pulley L to act as a brake. lmmediately after the feed-rollers stop the cam p strikes the bar K3, (see Fig. 3,) which bar is secured to the lower shear-blade, K2, and raises said shear-blade, which strikes the under side of the paper-tube and raises it and the ioat G until oat Gand the tube are stopped by contact with the frame M, when the under side of the tube is folded over the end of float G and is then cut off, leaving one side of the tube-projecting beyond the other side nearly as much as the thickness of float G. The distance that float G is set from the blades K1 K2 will also vary the distance that one side projects beyond the other. Soon after the blade K2 falls, of its own weight, the clutch l comes into gear again, the feed-rollers F F again move, and the operation is repeated, producing flattened tubes, the sides of which are of equal length, with one side projecting beyond the opposite side at each end, as shown in Fig. 7, the broken lines in which designate the edges of the paper on.

the end of bar t, which bar tis connected to slide u, in which is set the lingers c c c, which carry the tube sideWise to the conveyer w. Conveyer w consists of two endless aprons over rollers z, which are driven by beveled gear N connected to the lower one of the feedrollers F F. By the conveyer w the tube is carried onto the table V and under the pasting-trough O, and stops simultaneously with the feed-rollers F F, and while the shears cut another tube and drop it onto the rollers q q the cam P, on shaft 3, (which shaft is connected by beveled gear Q Q to shaft 2,) raises the slide R and lever S, which causes the pastingtrough O to descend. The trough O is provided with a roller, T, in its bottom, and a plate, U, on one side. A sectional View of the same and a portion of the table V are shown in Fig. 4. Directly under the plate U is a groove or recess, W. As the trough 0 descends the plate U presses the paper -into the recess W, and creases or swages it on line 8 8, Fig. 7, turning the end of it at nearly a right angle with the rest of the tube, while the roller T paper near the end so swaged.

deposits its paste from the trough O onk the Spring Z then raises the trough Ointo its former position.

The rollerT is provided with a ratchet, X, and pawl Y, to partially rotate the same each time it descends, but this is not considered absolutely necessary. If the bottomV of the pasting-trough Ov were simply perforated, it would probably answer all the purposes of the roller T. As the feed-rollers F F and conveyer w again move, the tube thus pasted and swaged passes on in front of the folder A', (which is hinged at 5 5,) while other tubes have been cut off to supply all the various places from which this one has been removed. The cam B then raises the slide O', which strikes the projection 6 on the folder Al and causes it to turn over toward the paper, and folds the part of it be fore turned at a right angle onto the rest of the tube and over the paste deposited from trough O, and presses the paper thus folded between the table V and folder A. The spiral spring Z then causes the folder A to rise again, and the conveyer w discharges a finished bag at one side of the machine, all of which operations can be performed and produce finished bags at the rate of sixty per minute.

Tov change the length of the bags, gears of different numbers of teeth can be used in the place of gears l I2.

If desired, the guides h might be made of rollers with a rounded groove in the edge.

The frame M and upper shear-blade K are represented broken, in order to better show the float G. The parts are represented somewhat out of proportion, being crowded closely together in the drawings. The iioat Gis capable of being used for cutting liattened tubes so as to leave the sides of the same uneven at each end, as described in a tube formed in any other manner.

The object of cutting the tubes off, as shown in Fig. 7, is to facilitate opening the bag at the top, while at the bottom it causes the paste to be easily deposited between the different thicknesses of the paper, so that both -thicknesses of the paper on the end turned shall adhere readily to the side of the bag.

The feed-rollers F F and shear-blades K1 K2 have an intermittent and reciprocal or alternate motion, before described 5 otherwise the paper, which is stopped for a moment by the gripe of the shear-blades, would be liable to gather and wrinkle between the said rollers and blades. A

What I claim as new, and desire to secure by Letters Patent, is

l. The combination of the former A, guides a c, paste-dish b, former B, inclined plane C, guides e e, oat D, guides h, weight E, feedrollers F F, float G, shear-blades Kl K2, fingers v c t, conveyer w, table V, pasting-trough O, plate U, recess W, and folder A', substantially as described, and for the purposes set forth.

2. The combination of the former A, guides a a, paste-dish b, former B, guides e e, inclined4 plane C, oat D, guides h, Weight E, feed-roll- 5. The combination of the pasting-trough ers F F, ioat G, and shear-blades K1 K2, sub- O, plate U, table V, and recess W, all arranged stantiall5r as described, and for the purposes and operating substantially as and for the purset forth. poses described.

3. The combination of the conveyer w, table V, pasting-trough O, plate U, recess W, J. P. PULTZ. and folder A1, substantially as and for the pury pose described. Witnesses:

4. The combination of the iioat G and a cut- J AMES SHEPARD, ting-off device, substantially as described, and JAMES C. TWICHELL.

for the purposes set forth. 

